Malicious PDF — malware analysis report

Static analysis result for SHA-256 51cdf69baef95d5c…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 19:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 825a28ffce169bc41d8464a4c90525d2 SHA-1: 6d64c8c7a793dc8987a4afdd2a1fde46063e0a4a SHA-256: 51cdf69baef95d5c0530f55574405ee9495f50791228b2f4db77a7d43e1d0adb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to Shopify domains, but the primary link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the target URL, reinforcing the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=conceptual+physics+teacher+edition+pdf In PDF document text
    • http://files.conwayfeedandgarden.com/uploads/1/3/0/7/130739155/45ec9cfe8f.pdfIn PDF document text
    • http://files.erinzak.com/uploads/1/3/1/6/131607010/putilowubijufun.pdfIn PDF document text
    • http://files.cushingparish.com/uploads/1/3/1/4/131437425/tubesato-fakavafidelavo-xogokelajofake.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5055/6821/files/todigepefonotaxaganu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/files/37719754814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/59073937003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/cete_dynamic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/46924558804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/birch_tree_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/10534550347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/wogesajusipapugigumerifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/66099487134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/95001644915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/dibowixuxuzomojajowo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 5248 bytes
SHA-256: 1f43c84a9292301de2495d8c6c40ed500d9e7bd0ea0be0e4c869a5e30c2a9019
font_01_sfnt_off000076c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C4 10080 bytes
SHA-256: 01efd54204c9fbcff8c257b9f4bdcd06bc438065ed70ca301b730d7fb521e8b1

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